Yeah I've heard there is quite an increase. I saw a really good YouTube review of the jacket from an America fella who had bought in the UK and said the same jacket would be over $300 if bought in the US.
It's cool to see a brand like Barbour is appreciated abroad though. It's so common in the UK that you don't think of it appealing elsewhere.
I like Barbour a lot. It's fairly common where I live (Boston), but not as big of a name as it is in the UK. There is an Outlet up in Maine where you can find extremely discounted Barbour gear if you're willing to make the short trip up.